Portable drill rigs



Dec. 27, 1955 K. E. BURG ET AL PORTABLE DRILL RIGS 9 Sheets-Sheet l Filed April 6, 1951 Dec. 27, 1955 K. E. BURG ET'AL 2,728,555

PORTABLE DRILL RIGS Filed April 6, 1951 9 Sheets-Sheet 2 ATTORNEYS;

Dec. 27, 1955 K. E. BURG ETAL PORTABLE DRILL RIGS Filed April 6, 1951 )lll D-EJ Dec. 27, 1955 K. E. BURG ETAL y 2,728,555

PORTABLE DRILL RIGS Dec. 27, 1955 K. E. BURG 'ET AL 2,728,555

PORTABLE DRILL RIGS Filed April e, 1951 9 sheets-sheet s INVENTORS BY M2M ATTORNEYS K. E. BURG ET AL PORTABLE DRILL RIGS Dec. 27, 1955 Filed April 6, 1951 Dec. 27, 1955 K. E. BURG ET AL PORTABLE DRILL RIGS 9 Sheets-Sheet 7 Filed April 6, 1951 m m o My E E www 1N. UMOA @Nov E E l R .E Hand-l TAFe www4 5W www# KNES ,JH I|J Tini/Maw- 8 f W n Nhe@ Mn@ ATTORNEYS Dec. 27, 1955 K. E. BURG Em l2,728,555

PORTABLE DRILL RIGS Filed April 6, 1951 9 Sheets-Sheet 8 P l A ATTORNEYS x. Dec. 27, 1955 K. E. BURG ETAL PORTABLE DRILL RIGS 9 Sheets-Sheet 9 Filed April 6, 1951 1N VENTORS KfW/VET# E 50196:.

ATTORNEYS PORTABLE DRILL RIGS Kenneth E. Burg, Dallas, Tex., Neil Warren Mann, Rio de Janeiro, Brazil, and Eugene J. Toomey, Dallas, and Stewart E. Vance, Garland, Tex., assignors to Texas Instruments Incorporated, a corporation of Delaware Application April 6, 1951, Serial No. 219,728

12 Claims. (Cl. 255-2) This invention relates `to drill rigs, and more particularly to a portable drill rig comprising individually prefabricated units which are easily and quickly assembled into the final drill rig structure and easily and quickly disassembled back into the individual units.

lt is often the case in drilling holes in the earth that the locations are in extremely rugged or thickly wooded terrain so that access to them presents a serious problem of transporting the necessary equipment. Then, too, as is often the case, the locations are at great distances from the main base of supplies and the expense of transporting the usual type of heavy drilling equipment is a paramount item.

Usual type drilling machines are heavy and can not be readily and completely disassembled into component sub-assemblies and parts of convenient size, shape and weight for transporting by man or pack animals. Furthermore, excessive amounts of time are required to align and assemble the various sub-assemblies and parts, at the drill site, which adversely affects their usefulness and economy.

This novel device eliminates many of the difficulties resultant to drill rig transportation, assembly and maintenance, which previously hampered, to a large extent, an elcient and economical drilling operation. The drill rig constructed according to this invention is comprised of a number of basic units, each of convenient size, shape and weight for packing by man or animals and built and arranged to fabricate quickly and easily with the other units into an ellicient earth drilling machine. The high drilling efliciency of this drill rig is largely attributable to the novel arrangement of component parts to place a very high proportion of the total weight on the top of the drill stem which, in turn, transmits this pressure to the cutting edges of the drill bit.

If the rig is to be assembled at the selected site, the units can easily be compactly arranged either on mule pack or on a truck and transported over extremely rugged terrain. lf the rig is to be assembled at the main base, it can be easily mounted for transportation on a truck provided with suitable mounting devices and transported in assembled form to the selected drill site.

lf the units are separately packed and transported to the selected site, erection of the rig is completed by manually tting the units together and rigidly mounting them in place by the use of permanently located guide pins, wing nuts, screws and the like. There is no necessity of welding, cutting, erecting temporary wood frameworks or even mechanical assistance from large power operated hoists. rihe problem of disassembling the unit is of comparable ease. The units are disassembled in approximately inverse order to their assembly and again only manual power, with the simple assistance of perhaps wrenches and the like, is needed.

Despite its simplicity of structure and light weight as compared to ordinary drills, the drill assembled in accordance with the teachings of this invention is an extremely eicient one. It is perfectly capable of drilling States Patent() through normal sub-surface strata and is also successful in drilling in the more rugged formations and its drill ing rate is comparable to the larger drills of the usual type. Any minor departures in utility of the portable rig from the larger rigs are easily overcome by the formers singular utility of easy assembly and disassembly, lightness in weight, ease of transportation, and inexpensiveness to construct, operate and maintain.

It is therefore an object of this invention to provide a portable drill rig composed of compact and light weight parts which are easily assembled or disassembled.

It is another object of this invention to provide a drill rig composed of separate fabricated units which are small, light weight, and of convenient shape to be easily packed on mules or the like to greatly reduce-the cost and diiculty of transportation over rugged terrain.

It is still another object of this invention to provide novel means for mounting the drill rig assembly in its finally constructed form to the particular mode of transportation, such as a truck or the like.

lBroadly, this invention comprehends a portable prefabricated drill rig assembly comprising a base supporting member, standards vertically disposed in said member andvquickly detachable therefrom, a platen frame assembly slidably mounted on said standards, a crown frame quick-detachably mounted to the top of said standards, a power unit, a winch assembly, a rotarytable on said platen frame, a means of power transmission from the power unit to the winch assembly, a means of power transmission from the power unit to the rotary table, and a means of establishing and disestablishing power transmission from the power unit to the rotary table.

Other and further objects of this invention will be apparent from the following description of the drawings:v

Figure l is a side plan view showing the drill rig as assembled including the water pump unit for providing flushing fluid to the drill string and freshly drilled hole;

Figure 2 is a top plan view of the base supporting member;

Figure 3 is a View taken along the line 3 3 of Figure 2;

Figure 4 is a side plan view of the base supporting member showing mounted thereto a winch for applying manual pressure to the drill string;

Figure 5 is a top plan view of the platen frame showing all the basic units mounted thereto;

Figure 6 is a top plan view of the platen frame minus the units which are mounted thereon;

Figure 7 is a view taken along the line 7 7 of Figure 5;

Figure 8 is a fragmentary View of the clutch and rotary table;

Figure 9 is a view taken along the line 9-9 of Figure 8;

Figure l0 is a View taken along the line 1li-10 of Figure 8;

Figure ll is a top plan View of the drill rig crown frame assembly;

Figure l2 is a View taken along the line 12-12 of Figure ll;

Figure 13 is a view in cross section of the means supporting the drill stem while pipe lengths are added thereto or subtracted therefrom, taken along the line ll3-13 of Figure 2;

Figure 13a is a top plan View of the means referred to in connection with Figure 13;

Figure 14 is a View in side elevation of the drill rig assembly mounted for transportation in a truck;

Figure 15 is an end view showing the drill rig assembly mounted to the truck for transportation therein;

Figure 16 is an end view showing the mounting device Patented nec. 27, 1955 avenues on the truck for attachment thereto of the drill rig assembly.

Referring irst to Figure l, the portable drill rig is composed of two main sub-assemblies: the water pump assembly 20, for supplying ushing lluid to the drill string; and the drill rig assembly 21. The Water pump is, in turn, composed of two sub-units, a pump unit 22 and a driving unit 23, such as a gasoline engine, for the pump unit.

The drill rig is divided into four sub-units. The trst sub-unit is the base supporting member 24, to which is mounted a Winch 25 for exerting pressure on the drill string, a guide and breakout slip 26 for guiding the drill string into the earth and unscrewing drill pipe as needed, slip joint members 27 for receiving standards therein, and the unit 27a for supporting the platen frame.

The second sub-unit comprising the drill rig is composed of the standards 23. These standards engage at one end into the slip joint members 27 and are tapered or reduced in diameter at their other end to receive 'other standards which tit thereon.

The third sub-unit comprising the drill rig is a Platen frame 29. This frame tits on the standards 28 in a manner to be illustrated later and carries the motor 30. This motor operates a rotary table 31 to drive the drill stem 32. The motor also operates through a gear box 33, a hoist 34 to lift the platen frame into position.

The fourth sub-unit comprising the drill rig is the crown frame 35. This crown frame is mounted on top of the standards 28 and includes a pulley wheel 36 for hoisting the platen frame into position and also includes a hook 37 for holding the platen frame 29 into position once it has been raised to a height determined by the hook.

To describe accurately the construction of each of the sub-assemblies and their respective sub-units, it is perhaps best to describe them in the order of their assembly into the nal drill rig construction. Pursuant to this, reference is rst made to Figure l. The water pump assembly 20 consists of a pump unit 22 having an intake hose 38 and an outlet hose 39. This pump is of the usual water pump variety as, for instance, the well-known Moyno pump. It is connected through a shaft 40 and a manually operated clutch 41 to a gas engine 23 of the usual type. The gas engine operates the pump only when the clutch is, by manual operation, closed. In this way the ushing duid supplied to the drill string 32, through the outlet hose 39, can be operated intermittently as desired.

The entire pump assembly is usually mounted on a suitable frame with wing nut connections provided for securing the assembly to the frame. The frame is, in turn, set on the earth a suitable distance from the drill rig assembly.

With the pump unit in place the drill rig assembly 21 is neXt constructed. The rst sub-unit of this assembly that is put into position is the base supporting member 24. This member and its sub-units will be better understood with reference to Figures 2, 3 and 4.

In these gures the member 24, as shown, has a rectangular base with mutually perpendicular sides, each side being a hollow pipe section designated in these gures as 42. For the purpose of additional balance and support, elongated pipes may be inserted into two of these sections 42. Two vertically positioned hollow pipe sections 27 form slip joints for the standards 28 and are welded to the rectangular base. These sections 27 are flanged at their upper ends. Supporting each of these vertical sections 27 are two 45 angle braces 43 welded to the rectangular base and to the sections 27.

At approximately the center of the rectangular base is mounted a guide member 26 comprised of a hat platform 44 (see Figure 2) having a central opening therein and means to hold a triangular plate member 45. This plate member also has a central opening to cooperate with the opening in the platform and also has a pivoted plate 46 having a third opening and a pin, chain and socket arrangement 47 for holding the three previously mentioned openings in alignment to receive the drill string for guiding therein.

To one end of the rectangular base is mounted a unit 27a comprising vertical pipe sections 48, 45 braces 49 and a square, pivoted frame structure 50 pivoting about a metal rod 51. This rod is mounted at both ends to the vertical sections 48. To this square frame structure for applying pressure to pivot it about the rod 51 is a stop pedal 52. This framework, when pivoted to a vertical position, acts as a support for the platen frame.

To the end opposite the mounting of the stop pedal unit is mounted the winch 25 for exerting pressure on the drill string 32. The winch is of the ordinary type and is comprised generally oa handle 53, a rotatable drum 54, cable 55 Wound therearound and mounting devices. The cable 55 is led off the drum (see Figure l) through .a pulley 56 to the two pulleys 57 and 58 on the under side of the platen frame 29, back to the base supporting member 24.

The winch is mounted to the oase support 24 by first mounting it to its own mounting frame consisting of two vertical pipe sections 60 having flattened ends 61 and grooves 62 for receiving bolts therein (see Figure 4). These sections 60 are mounted at their llattened end to the block 62 welded -to the rectangular base 42 of the base supporting member 24. To assist the supporting of the winch in this position, a third pipe section 63 is mounted between one of the sections 60 and the vertical slip joint section 27. Also there is provided a diagonal brace 64 from the other section 60 to the section 63. The mounting of the winch frame as well as the winch to its own frame is accomplished by a plurality of suitably positioned wing nuts and bolts.

With the base support 24 properly positioned on the ground, the winch, platform, guide and stop pedal unit properly mounted, the standards 28 are next assembled. These standards as shown in Figure l are hollow metal pipes which ,engage in one end in the slip joint pipe sections 27 and at their other end are tapered or reduced in di-l ameter .to receive other standards mounted at the point of reduced or tapered diameter. As shown in Figure 1, there are two such standard sections comprising the verti- Cal sides of the drill rig frame. Before the second standard is positioned, the platen frame 29 is mounted into position. The way that this is usually done is as follows. The base support 24, with one set of standards in place in the slip joint pipe sections 27, is laid on its side on the ground. The platen frame is then slipped over the standards. To understand how the platen frame is mounted or slipped over the Standards, reference is made to Figures 5, 6 and 7. In Figure 5, the platen frame as `shown is constructed of a number .of hollow pipe sections welded together and a number of bolts attached to these sections. More specitically, the base of the platen frame is composed of six pipe sections, two of which are longer than the other four and arranged parallel to each other. The two longer sections are designated in these gures by numeral 65. The ends of these sections 65 are closed by an angular section cornprising two short pipe sections 66. Mounted at the apex of the angular section are two vertically positioned hollow pipe sections 67 which are similar to sections 27 of the base support member 24. 45 braces 68 are welded to the base and to the sections 67 to assist in their support.

Within the hexagonal base defined by the sections 65, 66 and 67 are three bridging sections of pipe lengths 69,

7l) and 71 welded at their ends to the sections 65. Av

fourth pipe section 72 is welded between one of the sections 66 and the bridging section 69. All of these sections mounted within the hexagonal base are provided with mounting devices 73 for retaining bolts for wing nuts which will ultimately be used in the assembly to fasten the various units to the platen frame.l One of the sections 65 is also provided with similar mounting devices 74, which in this instance are three in number. It will be noted that some of these mounts are provided with slots for adjusting the positioning of the bolts therein.

The winch cable 55, as previously mentioned in connection with Figure l, is threaded through the pulley 58, the pulley bracket 75 mounted to one of the sections 65, and the pulley 59. These pulleys are mounted to the platen frame by snap locks 76 engaging the eyes 77 on both sections 72 and 71.

There is also mounted to the hexagonal base of the platen frame a bearing support assembly (see particularly Figure 7) which is composed of a bridging pipe section 80 welded between the sections 65 and two sections 81 and 82 extending vertically from section 80 but inclined at some angle less than 90 thereto to form a triangular structure at the apex of which is mounted the bearing plate 83. This bearing plate is to support one end of hoist assembly 34, the detailed function of which will be explained later.

The platen frame is mounted to the drill rig assembly by sliding the vertical pipe section 67 over the standards 28. This being done, an additional standard is slipped into the standard already in place and the crown frame 35 (see Figure l) mounted to the top of the entire rig.

The crown frame 35 (as best shown in Figures 1,11 and l2) consists of a triangular assembly, the base angles of which form two standard caps 84. Welded' to these standard caps are two pipe sections 35, in parallel, forming the base of the triangle a and the bent pipe section 86 forming the other two sides. At the apex of the triangle is mounted for rotation a grooved pulley wheel 36 in whose groove passes the cable 87 anchoring at one end the platen frame 29 by snap lock 90 engaging the pivoted bail member 78 (see Figures l, and 6). This bail member is mounted for pivotal movement to the sections 65 of the platen frame and has a grooved ring 79 for receiving the snap lock 90. The other end of the cable 87 passes over the hoist drum 34. When the motor driven hoist 34 has raised the frame to a desired height, the anchor hook 37 which is pivotally mounted to the base section 85 and biased by spring 91 is engaged under the bail member 78 to relieve the winch of the platen frame load. The hook 37 is manually operated by cable 88 passing through pulley eye 89.

Before the platen frame is raised by the crown frame assembly and motor driven hoist on the platen frame, the motor 30. rotary table and clutch assembly 31, gear box 33 and hoist assembly 34 are arranged in place on the platen frame.

Referring particularly to Figures l, 5, 7 and 8, the motor 30 is placed on the left hand portion of the platen frame (as shown in Figure 5) and bolted down by wing nuts and bolts provided therefor. This motor is of the usual gasoline type and can be manually started by pulling a flexible cable 92, which cable hangs down from the platen frame available to the operator (see Figure l).

To the shaft 93 of the motor 30 is mounted a sheave 94. About this sheave and engaging in one of its grooves is a belt 95 which engages about a groove of a sheave 96 of a gear box 33. This gear box is mounted to the right hand portion of the platen frame 29 (see Figure 6) by suitably spaced wing nut and bolt assemblies. Within the gear box are suitable gears to convert the rotary motion of the sheave 96 and shaft 97 to rotary motion of a shaft 98 which extends at right angles to the shaft 97 and the hoist drum 34 mounted thereto.

The shaft 98 extends through the hoist drum 34. Said drum is mounted to said shaft. The shaft rotates in the bearing assembly 83 mounted to the platen frame and is driven, as described, by the motor 30 to raise the platen frame 29 to any desired height.

The rotary table including a clutch assembly 31 is mounted in the middle of the platen frame 29 and is driven by. a belt 99 extending from the other groove of the sheave 94 of the motor 30'around a sheave 100. Thel sheave 100 is connected to a Shaft 101, which is, in turn, connected to one side of a clutch 102'. The other side of the clutch 102 is connected to a shaft 103 which has a worm thereon meshing with a gear which is attached to a shaft 104. The worm and gear are both housed in housing 105. At the lower end of the shaft 104 there .is a driving collar 106. Driving collar 106 coacts and drives the fitting 107 to which the string is attached.

To control the operation of the clutch 102, a cable 108 extends downwardly from the frame 29 to a position where it may be grasped by an operator. The other end of the cable 108 is attached to a link 109 which is pivotally connected to a rocker arm 110. The rocker arm is pivoted at 111 to a part of the housing 105. The other end of the rocker arm is fitted with a pin 112 for mounting thereto an elongated link 113. The pin follows the contours of section 117 when it moves in response to the pivoting of the rocker arm 110.

To the other end of the link 113 a spring 116 is mounted. The spring is xedly mounted at its other end to a portion of the frame 29. The spring normally biases the rocker arm in a position as shown in Figure 8.

Positioned between the pin 115 and the pin 112 is a cam 117 which controls the operation of the rocker arm 118. When, through cable 108, the pin 115 on the elongated link 113 follows the arcuate contour of cam 117 and the pin 115, being coupled to the movement of pin 112 by link 113, forces the cam 117 to pivot about its pin 119. Pin 115 follows the contour of the cam 117 until it reaches the socket 120.

When the cam 117 pivots, it forces the rocker arm 118 to pivot about its pivot mount 121. When the rocker arm 118 moves in response to the manual force applied through cable 108, it moves in a counterclockwise direction as shown in Figure 8 and therefore moves the portion 123 of the arm 118 in a direction to engage the clutching surfaces of the clutch 102.

To review, then, the operation of the entire device after it has become completely assembled, with reference particularly to Figure l, after all of the necessary units have been mounted to the platen frame 29, motor 30 is set into operation and, as has been heretofore described, it operates the hoist drum 34. The hoist drum 34 has wound around it the cable 87. The cable 87 loops through the wheel 36 and, by snap hook 90, engages the element 78 pivotally connected to platen frame 29. The rotation of the winch 34 raises the platen frame 29. When the platen is elevated to add a length of drill stem or to remove the drill stem from a completed drill hole, the hook 37, which is manually operated by cable 89, engages the element 78 and thereby relieves the hoist assembly of the weight of the platen frame. The cable 87 slips on the winch 34 when not raising the platen frame in a manner similar to a cathead.

The motor 30 also drives the drill stem through the clutch assembly and rotary table. When cable 108 is manually operated, the clutching action as heretofore described takes place and the drill string rotates. The motor 30 is started by the cable 92.

In addition to the weight of the platen frame and units thereon, the drill string 32 can be forced into the earths surface by pressure applied through the winch assembly 25, as the occasion arises. The winch assembly 25 is manually operated and pulls the platen frame 29 downwardly to add pressure to the drill string, thus supplementing the weight of the platen frame and units thereon.

As each length of drill string enters the earth the fitting 107, as shown in Figure 9, is unscrewed from the drill string, and the platen frame is raised a suficient distance to allow another length to be inserted between the fitting 107 and that length already in the surface of the earth. It is necessary in engaging one length to another that the bottom length be held stationary so that it will not become disengaged with that length to which it is already threaded during the threading :of the new pipe length. As shown .in Figure 13, this is accomplished according to the teachings of this invention by .the use of a slip shown in .top plan view in this figure and in crosssection in Figure 13a. Pivotally mounted to the triangular plate member 45 is a second plate member 124. This plate member 124 pivots about a pivot pin 125 which engages through the member 124 and the member 45. When, for instance, a pipe length is to be added to the string 32, the plate member 124 is swung to a position shown in Figure 2. The lock pin 126 engages in the drill holes 126a and 126b. Two jaw boxes 200, one mounted to the plate member 45, the other to the plate member 124, are then positioned flush with the stem 32. These jaw boxes, as best shown in Figure 13, have their inner surfaces sloping outwardly from the bottom. Next, two jaws 201 are placed in the jaw boxes as shown in Figure 13. These jaws have serrated faces which grip the stem 32. Also, these jaws are chained by chains 202 to anchor ypins 203 so as to prevent their misplacement. It will be noted that these jaws are tapered lengthwise from top to bottom complementary to the jaw boxes.

By this means a wedging action takes place, the actuat ing force being supplied by the weight of the drill string itself. With the jaws in place, the lock pin in place, the stem weighing downwardly on the jaws, the serrations gripping the stem, pipe lengths may easily be added to or subtracted from the stem by using a conventional pipe wrench. It the stem is to .be lowered into the hole after the addition of a pipe length, the plate member 124 is pivoted outwardly after removing the lock pin 126 and the pipe joint .passes easily by the assembly.

As shown in `Figures 14 to 16, the entire drill rig assembly, when in tinal assembled form, may be mounted to the rear of a truck. A mounting device, generallyv designated in these figures by numeral 127, is provided which engages the base support member 24 Vof ,the drill -r-ig assembly and is pivotal so that, as shown in Figure 14, the entire .drill rig assembly may `be placed in a reclined .position in the back of the truck.

The stationary .portion vof the mount 127 consists of two plates 128 bolted and welded to the lower rear edge of the truck rear compartment. These plates 128 are -usually L-shaped in cross section, one ofthe sides of which extend above the edge 129. To the top of this L-shaped plate is pivotally mounted a section 130. This section 130, as better shown lin Figure 14, is provided at its lower end with pipe sections which are capable of engaging in the pipe sections of the base support member 24. A horizontal member 132 welded to the plates 128 completes lthe mounting 127.

To mount the drill rig assembly to this mounting 127, the solid pipe lengths 131 are engaged into the pipe sections 42 of the base supporting member 24.

To place the drill rig assembly into the reclined position shown in Figure 14 from the vertical position shown in fragmentary form in Figure l5, the stop pedal 52 is compressed, causing the platen frame to be raised, partially assisted by manual lifting force applied through the winch 34 by cable 87. When the center oi gravity l,has been raised a desired amount, the drill rig assembly is, while controlled, allowed to recline into that position shown in Figure 14. It will be noted that the pivoted members 130 are then Vin the extended position as shown.

The drill rig assembly may be secured in this reclined position by any suitable means provided in the rear compartment of the truck.

All of the component parts have been described heretofore in detail. It is important, however, that some idea of :the relative size of each of the units be had. For this purpose there is tabulated below the weights in pounds .and numbers l,of .the various components.

Pieces Weight Derrick Base l 62 Base Plate 1 15 4 100 1 35 riotal Derrick 212 Rotary Table:

Base 1 43 Motor, completo. l 93 Kelly drive l 73 Winch l 49 Total Rotary Table 258 Pull Down:

Hand Winch 1 17 Pulleys l lb. each 3 3 30 ft. Cable.. 1 4 Wrench 1 8 Total Pull Down 32 Pump:

Motor, complet 1 89 Base 1 40 Clutch 1 ,37 Pump, complete 1 88 '15 It..snction hose and fittings l 25 20 it. rotary hose and fittings 1 15 Total Pump 294 Drill String:

vDrill pipe, 7 It. 15 lbs. each 13 195 Bits 1 4 Total Drill VString 199 Maintenance Kits:

Formatore 1 40 For drill rig 1 25 Total Maintenance Kits 65 Grand total weight of drill in eld 1,065 pounds.

What has cbeen described is a preferred embodiment of this invention. Other embodiments obvious from the Ateacsllings herein to one skilled in the art are within the spirit of this invention.

What is claimed is:

1. A portable Prefabricated drill rig comprising a base member, standards having one end of each quick-detach- .ably connected to said base member, a crown frame quickdetachably connected to the other ends of the said standards, a platen frame mounted for sliding movement along said standards, a power unit mounted on said platen frame, a rotary table on said platen frame, selective means .to establish a driving connection between said power unit and said rotary table to rotate said table or to establish a v.driving connection between said power unit and said crown `frame so that the power unit can be employed `to raise the platen frame to an operating position near said crown frame, and means, in addition to the weight .of said platen frame and separate from said power unit, voperable from a point near said base to urge said platen frame toward the ground whereby to apply pressure to said rotary table.

2. .A portable Prefabricated drill rig comprising a base member, standards having one end of .each quick-detachably connected to said base member, a crown frame quickdetachably connected to lthe other ends of the said standards, a platen-frame mounted for sliding movement along said standards, a lpower unit mounted on said platen frame, a rotary table von said platen `frame, selective means to establish a driving connection between said power unit 'and said rotary table to rotate said table or to establish a driving connection between said powerunit and said crown frame so that the power unit can be `employed .to raise the platen frame to an operating positionnear said crown frame, a drill string connected to said rotary table, and means in addition to the weight of said platen frame Vand separate from said power unit operable from a point near said `base to `urge.saidpplaten 3. A portable prefabricated drill rig comprising a base member, standards having one end of each quick-detachably mounted to said base member, a crown frame quick-detachably connected to the other ends of said standards, a platen frame mounted for sliding movement along said standards, a power unit mounted on said platen frame, a rotary table mounted on said platen frame, means to establish a driving connection between said power unit and said rotary table, and means to raise the platen frame to an operating position near said crown frame, and means, in addition to the weight of said platen frame and separate from said power unit, operable from a point near said base to urge said platen frame toward the ground whereby to apply pressure to said rotary table. 4. A portable prefabricated drill rig comprising a base member, standards having one end of each quick-detachably connected to said base member, a crown frame quick-detachably connected to the other ends of the said standards, a platen frame mounted for sliding movement along said standards, a power unit mounted on said platen frame, a rotary table on said platen frame, selective means to establish a driving connection between said power unit and said rotary table to rotate said table or to establish a driving connection between said power unit and said crown frame so that the power unit can be ernployed to raise the platen frame to an operating position near said crown frame, means mounted to said crown frame for engaging a portion of said platen frame to temporarily hold such platen frame in operating position and means, in addition to the weight of said platen frame and separate from said power unit, operable from a point near said base to urge said platen frame toward the ground whereby to apply pressure to said rotary table.

5. A portable prefabricated drill rig comprising a base member, standards having one end of each quick-detachably connected to said base member, a crown frame quickdetachably connected to the other ends of the said standards, a platen frame mounted tor sliding movement along said standards, a power unit mounted on said platen frame, a rotary table on said platen frame, selective means to establish a driving connection between said power unit and said rotary table to rotate said table or to establish a driving connection between said power' unit and said crown frame so that the power unit can be employed to raise the platen frame to an operating position near said crown frame, a mud pump hose connected to said rotary table, a drill string connected to said rotary table, said mud pump hose supplying fllushing fluid to said drill string and being lifted to position with said platen frame, pumping means to supply said liushing fluid and means, in addition to the weight of said platen frame and separate from said power unit, operable from a point near said base to urge said platen frame toward the ground whereby to apply pressure to said rotary table and hence to said drill string.

6. A portable prefabricated drill rig comprising a base member, standards having one end of each quickdetachably connected to said base member, a crown frame quick-detachably connected to the other ends of the said standards, a platen frame mounted for sliding movement along said standards, a power unit mounted on said platen frame, a rotary table on said platen frame, selective means to establish a driving connection between said power unit and said rotary table to rotate said table or to establish a driving connection between said power unit and said crown frame so that the power unit can be employed to raise the platen frame to an operating position near said crown frame, said selective means comprising a clutch, a rocker arm, means to manually rock said arm, a pivoted spring bias cam pivoting in response to the movement of said rocker arm, a second rocker arm mounted to said cam to operate said clutch.

7. A portable prefabricated drill rig comprising a base member, standards having one end of each quick-detachably connected to said base member, a crown frame quickdetachably connected to the other ends of the said standards, a platen frame mounted for sliding movement along said standards, a power unit mounted on said platen frame, a rotary table on saidy platen frame, selective means to establish a driving connection between said power unit and said rotary table to rotate said table or to establish a driving connection between said,

power unit and said crown frame so that the power unit can be employed to raise the platen frame to an operating position near said crown frame, a drill string mounted to said rotary table, a drill string guide mounted on said base in registry with said rotary table to guide said drill string into the earth and means, in addition to the weight of said platen frame and separate from said power unit, operable from a pointnear said base to urge said platen frame toward the ground whereby to apply pressure to said rotary table and hence to said drill string.

8. A method of assembling a portable prefabricated drill rig that comprises placing a base supporting member having vertically disposed sockets therein on the ground, placing a platen frame having vertically disposed sockets therein in registry with said base supporting member so -as to register said sockets, placing standards in said sockets, laying said partially assembled rig on its side, mounting a crown frame to said standards, returning said partially assembled rig to a vertical position, mounting a power unit to said platen frame, mounting a rotary table to said platen frame, mounting a winch to said platen frame, establishing a driving connection between said power unit, said rotary table and said winch, and raising said platen frame into operating position.

9. A method of assembling a portable prefabricated drill rig that comprises placing a base supporting member having vertically disposed sockets therein on the ground, placing a platen frame having vertically disposed sockets therein in registry with said base supporting member so as to register said sockets, placing standards in said sockets, laying said partially assembled rig on its side, mounting a crown frame to said standards, returning said partially assembled rig to a vertical position, mounting a power unit to said platen frame, mounting a rotary table to said platen frame, mounting a winch to said platen frame, establishing a driving connection betweenI said power unit and said winch, raising said platen frame into operating position, mounting a drill string to said rotary table, engaging Said drill string in a string guide in the said base member, establishing a driving connection between said power unit and said rotary table, and manually applying additional weight to the drill string to assist the weight of said platen frame in forcing the said drill string into the surface of the earth.

10. A portable Prefabricated drill rig as dened in claim 3 including a drill string guide below and in registry With said table, said guide including a pivotable member, a stationary gripping member on said guide, a gripping member on said pivotable member, each or" said gripping members comprising a wedge-shaped member and means to contain said wedge-shaped member and to direct said wedge-shaped member against said drill string to hold said drill string in place.

l1. A portable Prefabricated drill rig comprising a base member, standards having one end of each quick-detachably connected to said base member, a crown frame quick-detachably connected to the other ends of the said standards, a platen frame mounted for sliding movement along said standards, a power unit mounted on said platen frame, a rotary table on said platen frame, selective means to establish a drivingconnection between said power unit and said rotary table to rotate said table or to establish a driving connection between said power unit and said crown frame so that the power unit can be employed to raise the platen frame to an operating position near said crown frame, a drill string connected to said rotary table, said platen frame, power unit, rotary table, and means, in addition to the weight of said platen frame and separate from said power unit, operable from a point near said base to urge said platen frame toward the ground whereby to apply pressure to said rotary table and hence to said drill string.

12. A portable Prefabricated drill rig comprising a base member, a plurality of standards each having its lower end quick-detachably connected to said base member, a crown frame connected in quick-detachable fashion to the upper ends of said plurality of standards, a platen frame mounted for sliding movement along said plurality of standards, a rotary table arranged on said platen frame, a drill string mounted to said rotary table, a drill string guide mounted on said base member in registry with said rotary table to guide said drill string into the earth, a pulley mounted to the top of said crown frame, a Winch mounted on said platen frame, a line engaging said platen frame, passing over said pulley and wrapped around said winch whereby rotation of said winch in one direction results in said platen frame being elevated and rotation in the opposite direction results in said platen frame being lowered, a motor mounted on said platen frame, and selective means to establish a driving connect-ion between said motor and said rotary table to rotate said table and between said motor and said winch to raise and lower ysaid platen frame, said Ywinch and said Imotor in cooperationv with said platen frame constituting an appreciable weight mass which is adapted to exert a pres sure upon the top of said drill string through the agency of said rotary table to urge said drill string into the ground.

References Cited inthe le of this patent UNITED STATES PATENTS 170,790 Way Dec. 7, 1875 693,801 Leaver-ton Feb. 18, 1902 853,018 Lamb et al. May 7, 1907 970,880 Bouchet Sept. 20, 1910 1,141,927 Boyd et al. June 8, 19175 1,143,019 Auchu lune 15, 1915 1,527,323 Moore Feb. 24, 1925- 1,781,889 Wertzberger Nov. 1.8, 1930 1,820,519 Wertzberger Aug. 25, 1931 1,894,039 Hill Ian. 10, 1933 2,084,686 Howard June 22, 1937 2,343,517 Alexander et al Mar. 7, 1944 

